The entire trilogy has subtitles like that, and all of them are named after books by Friedrich Nietzsche (Der Wille zur Macht, Jenseits von Gut und Böse, and Also Sprach Zarathustra).
As far as the remaster is concerned, I'd get it if it ever releases in Europe. When the games were originally made the only one of the trilogy that was released in Europe was the second episode, so a remaster would be my first chance at playing the first and third games in the trilogy.
Did you play Xenosaga: Episode 2 without playing 1 & 3?
Epi 2 was sort of the black sheep of the saga. Namco started interfering with the development, and decided to cut content to save it for Epi 3. Fired one of the writers (Soraya Saga) who later wrote about what happened in her blog. The game was at that point supposed to be a series of 6 games. But due to Episode 2 underperforming (partially thanks to Namco) they decided to wrap things up in the third game.
In spite of that, I felt it was still a significantly better game than Epi 2, so if you enjoyed it, hopefully you'll love Epi 3.